Empirical Correlation for Estimating Shear-Wave Velocity from Cone Penetration Test Data for Banks Peninsula Loess Soils in Canterbury, New Zealand

McGann, Christopher R.; Bradley, Brendon; Jeong, Seokho

doi:10.1061/(asce)gt.1943-5606.0001926

Cited by 8 publications

(19 citation statements)

References 18 publications

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“…This means that these models perform poorly in capturing the underlying physics of the problem as the selected input features should have a meaningful impact on the predictions. Only the models by Robertson and Cabal [14] and McGann [15] show a positive R 2 score which is still close to zero. The scatter on the input data plays a significant role in this assessment.…”

Section: Statistical Evaluation Of Cpt-based Correlations For the Nor...mentioning

confidence: 87%

“…Out of the five selected correlations, the correlation by Robertson and Cabal [14] has the most neutral bias and a relatively small COV. The correlations by Wride et al [11] and McGann et al [15] have a tendency for underprediction of V s while the correlation of Hegazy and Mayne [10] shows a tendency for overprediction of V s . The accuracy metrics are summarised in Table 3.…”

Section: Statistical Evaluation Of Cpt-based Correlations For the Nor...mentioning

confidence: 89%

“…Following the Christchurch earthquake event, McGann et al [15] developed a correlation between CPT data and shear wave velocity for soils from the Christchurch region in New Zealand. The correlation utilised q t , f s and depth.…”

Section: Mcgann Et Al (2018)mentioning

confidence: 99%

“…When direct shear wave velocity measurements at the location under consideration are not available, a correlation between conventional CPT measurements and shear wave velocity (or small-strain stiffness) is generally used. Several authors have formulated correlations between CPT measurements and G max or V s [8][9][10][11][12][13][14][15][16], each based on a dataset containing both CPT measurements and direct measurement of V s . It should be noted that G max and V s are related through the fundamental relation G max = ρV 2 s , where ρ is the bulk density of the soil.…”

Section: Introductionmentioning

confidence: 99%

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A Critical Review of CPT-based Correlations for Shear Wave Velocity in North Sea Soils

Stuyts,

Weijtjens,

Jurado

et al. 2024

Preprint

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The geotechnical characterisation of offshore wind farm sites requires measurement or estimation of the small-strain shear stiffness Gmax of the subsoil. This parameter can be derived from shear wave velocity Vs measurements if the bulk density of the soil is known. Since direct measurements of Vs are generally not available at all foundation locations in a wind farm, CPT-based correlations are often used to determine location-specific stiffness parameters for foundation design. Existing correlations have mostly been calibrated to onshore datasets which may not contain the same soil types and stress conditions found in the North Sea. The distinct geological history of the North Sea necessitates a critical review of these existing CPT-based correlations. They are evaluated against an extensive database of in-situ Vs measurements in the Southern North Sea. The importance of modelling the stress-dependent nature of Vs is highlighted and a novel stress-dependent model for Vs from CPT data is presented. As the small-strain stiffness is used as an input to foundation response calculations, the model uncertainty of the correlation can introduce significant uncertainty in the resulting foundation response. This transformation uncertainty is quantified for each of the correlations evaluated in this study and shows important variations.

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Section: Statistical Evaluation Of Cpt-based Correlations For the Nor...mentioning

confidence: 87%

Section: Statistical Evaluation Of Cpt-based Correlations For the Nor...mentioning

confidence: 89%

Section: Mcgann Et Al (2018)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Critical Review of CPT-based Correlations for Shear Wave Velocity in North Sea Soils

Stuyts,

Weijtjens,

Jurado

et al. 2024

Preprint

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“…On the one hand, it is necessary to understand the nature of the database that generated soil-type specific equations, before applying them to site-specific CPTu data. On the other hand, generic correlations (Robertson, 2009;McGann et al, 2015;McGann et al, 2018;Tong et al, 2018) can be applicable for all soil types as they introduce parameters that can account for differences in behavior, such as I c and B q (McGann et al, 2015).…”

Section: Previous Published Cptu-v S Correlationsmentioning

confidence: 99%

Relationship Between Shear Wave Velocity and Piezocone Penetration Tests on the Brazilian Continental Margin

Borges¹,

Souza²,

Almeida³

2020

S&R

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A detailed characterization of the shear wave velocity profile is an essential tool in the resolution of a variety of seismological and geotechnical engineering problems. The main objective of this study is to present equations capable of providing reliable shear wave velocity profile estimations based on CPTu parameters. The results of a series of pioneering in-situ seismic piezocone penetration tests on the Brazilian continental margin are presented in this paper. A complete geological and geotechnical characterization of multiple sites was performed. Multiparameter and single parameter correlations were proposed between the measured shear wave velocity and the piezocone penetration test parameters. The suitability of the proposed correlations was evaluated by means of a statistical analysis and compared to the performance of previously published correlations using the test data parameters as input. The results show that the study was successful in presenting equations with superior performance for local soil conditions. Furthermore, this study yielded new reliable correlations that will benefit future projects in similar offshore environments.

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Bayesian probabilistic characterization of the shear-wave velocity combining the cone penetration test and standard penetration test

Zhai,

Du,

2023

Stoch Environ Res Risk Assess

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The shear wave velocity 𝑉 𝑆 is of interest since it can provide information related to soil smallstrain stiffness characteristics and site classification. However, it is difficult to measure 𝑉 𝑆 directly without special equipment, particularly in smaller and medium-sized projects. Thus, numerous studies are conducted on V-S correlating, and extensive research has demonstrated that cone penetration test (CPT) and standard penetration test (SPT) data have a good relationship with shear wave velocity. Due to the uncertainty of the transformation model, such 𝑉 𝑆 values calculated by the empirical equation are unsatisfactory. The purpose of the present paper is to propose a Bayesian framework for determining the probabilistic characteristics of 𝑉 𝑆 in the context of transformation uncertainty. In addition, the Bayesian framework considers both in situ test data (SPT, CPT) and prior information. Results indicate that the Bayesian framework considering two in-situ tests accurately predicts the shear wave velocity. There are several advantages of using the Bayesian method described in this study. 1. The Bayesian framework incorporates both the inherent uncertainty of the shear wave velocity and the transformation uncertainty.2. Prior information and field data can be combined. 3. In the framework, statistical characteristics of the 𝑉 𝑆 can be ascertained from small samples of field test data.

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Empirical Correlation for Estimating Shear-Wave Velocity from Cone Penetration Test Data for Banks Peninsula Loess Soils in Canterbury, New Zealand

Cited by 8 publications

References 18 publications

A Critical Review of CPT-based Correlations for Shear Wave Velocity in North Sea Soils

A Critical Review of CPT-based Correlations for Shear Wave Velocity in North Sea Soils

Relationship Between Shear Wave Velocity and Piezocone Penetration Tests on the Brazilian Continental Margin

Bayesian probabilistic characterization of the shear-wave velocity combining the cone penetration test and standard penetration test

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